Muž v masce. Ochrana proti virům, infekcím, výfukovým a průmyslovým emisím. - Stock fotografie a obrázky

Panorama of male scientist, scientific researcher or doctor looking at a test tube of clear liquid in a medical research lab or laboratory with microscopes and his female colleagues behind him panoramic web image

Researcher, doctor, scientist or laboratory assistant working with plastic medical tubes in modern lab or hospital.

Through the glass. female scientist sitting at a laboratory table. science and health.

Portrait of pretty female laboratory assistant analyzing a blood sample at hospital .

A medical or scientific researcher or doctor looking at a test tube of liquid green solution in a laboratory.